<html>

<head>
    <meta charset="utf-8" />
    <title>这是标题</title>
</head>



<body>
    <!-- 1.选择控件 -->
    <form action="#" method="get">
        <!-- (1)单选控件 -->
        性别:男<input type="radio" name="sex" value="1" checked>
        女<input type="radio" name="sex" value="2"><br>

        <input type="submit" value="提交数据">
    </form>

</body>

</html>